Finding the Fourth Proportional to 72,997.07, 109,513.82 and 20,406.13

Step by Step Solution

1. Step 1: Write the proportion equation
   72,997.07 : 109,513.82 = 20,406.13 : x
2. Step 2: Convert to fraction form
   72,997.07/109,513.82 = 20,406.13/x
3. Step 3: Cross multiply
   72,997.07x = 109,513.82 × 20,406.13
4. Step 4: Simplify right side
   72,997.07x = 2,234,753,024.95
5. Step 5: Solve for x
   x = 2,234,753,024.95/72,997.07
6. Step 6: Final answer
   x = 30,614.29